PH Value 9.0-10.0 Industrial Sodium Tripolyphosphate CAS Number 7758-29-4 Used For Ceramics And Building Product Description: Sodium Tripolyphosphate (STPP), which is also referred to as pentasodium triphosphate or sodium triphosphate, has the chemical formula Na5P3O10 and a molecular weight of 367.86. It typically appears as white granules or powder with an apparent density ranging from 0.35 to 0.95 g/cm³. The compound has a high melting point of 622°C. This substance is